light primer striking problem

[jond41403]

"I hope we are not drifting OP’s thread too far, "
sorry for my ignorance, but what does OP mean?

Original poster, the person that started the thread

[donki1967]

gentlemen,
for the moment I can not go further in my tests following your precious advice.
I'm trying to find the bolt removal tool and longer cases.
Thank you, I'll get back as soon as possible.
Happy July 4th Celebration.
donki

[butlersrangers]

Ten days till Bastille Day! Get ready to Celebrate.

[72 usmc]

That primer is really backed out. Get someones FIELD gauge for an M1 carbine and see if the rifle closes down on a FIELD gauge.
see
M1 Carbine headspace - CMP Forums



M1CarbinesInc.com

I might have missed this in the 5 pages, but does your bolt fire original military ammo OK? Have you tried original ammo not reloads???? Opps I see you are in France. Might be hard to locate a FIELD gauge and original ammo--bummer. I have the same problem with original French headspace gauges for my Mas 36 and 49/56.

[Joseph457]

I was having same issue with mine before i was advice to get a new factory case .

[MGMike]

This has gotten silly. 45 posts over what is pretty clearly an ammunition problem created by handholds. I'll bet it would go away with factory ammo.

No special tool is needed to disassemble the bolt; a twist with a screwdriver is all that's necessary to pry out the extractor; the firing pin and all the other bolt parts will then come out.

Measuring headspace with gauges is a waste of time if the cartridge cases actually being used are not dimensioned within U.S. military specs. Too much headspace just produces misfires, but too little headspace can be dangerous. A cartridge case that is too long can prevent full rotation of the bolt, and induce insecure "toenail" locking. This will --sooner or later-- swage off the corners of the locking buttresses in the receiver, ruining the receiver, or --in more extreme scenario-- let the bolt open prematurely while pressure is still high and burst the cartridge case. If that happens, you will know it.

M

[DaveHH]

Consider this: These bolts are not Garand bolts, they may come apart like an M1 rifle but everything is smaller and more tender. Let's say that the OP tries what you suggest and the plunger goes flying and the spring breaks. Then where is he? "Too much headspace just produces misfires ", we know that, that's why there are 5 pages.... These things aren't just damaged with too long cases, they will blow up.

[donki1967]

Hi,
My ordered RP cases arrived last week.
This morning I went to the range for testing a longer case length, namely trimmed to 1.284.
The shooting of my reloaded ammo went very well, no jam or misfire.

[browningautorifle]

The shooting of my reloaded ammo went very well, no jam or misfire.

Good, sort of what we expected.

[floydthecat]

I’d agree with Mike that very early on, short cases were the issue here. The minimum case length is 1.280, but that assumes the action is not longer than a field gauge measurement and you can take your pick of gauge lengths from 1.299 to 1.302.

I think actual factual accurate head space measurements are very useful to determine the condition of the action. The OP might not even have to ever trim his brass as long as the case length doesn’t exceed his head space. 1.284 is not much longer than 1.280. Likely could guarantee better performance with longer case-lengths.

I am still waiting for someone to produce evidence of a ruptured spec-loaded carbine case due to long head space.
None have surfaced that I have heard about. The carbine chamber is completely supported and as long as the brass is spec…….very unlikely to experience a rupture. The carbine will very likely stop firing before a case would be exposed enough to cause a rupture due to long head space.